reifydb_engine/vm/
stack.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2026 ReifyDB
3
4use reifydb_core::{internal, value::column::columns::Columns};
5use reifydb_evaluate::stack::Variable;
6use reifydb_value::error;
7
8use crate::Result;
9
10#[derive(Debug, Clone)]
11pub struct Stack {
12	variables: Vec<Variable>,
13}
14
15impl Stack {
16	pub fn new() -> Self {
17		Self {
18			variables: Vec::new(),
19		}
20	}
21
22	pub fn push(&mut self, value: Variable) {
23		self.variables.push(value);
24	}
25
26	pub fn pop(&mut self) -> Result<Variable> {
27		self.variables.pop().ok_or_else(|| error!(internal!("VM data stack underflow")))
28	}
29
30	pub fn peek(&self) -> Option<&Variable> {
31		self.variables.last()
32	}
33
34	pub fn is_empty(&self) -> bool {
35		self.variables.is_empty()
36	}
37
38	pub fn len(&self) -> usize {
39		self.variables.len()
40	}
41}
42
43impl Default for Stack {
44	fn default() -> Self {
45		Self::new()
46	}
47}
48
49#[derive(Debug, Clone)]
50pub enum ControlFlow {
51	Normal,
52	Break,
53	Continue,
54	Return(Option<Columns>),
55}
56
57impl ControlFlow {
58	pub fn is_normal(&self) -> bool {
59		matches!(self, ControlFlow::Normal)
60	}
61}
reifydb_engine/vm/stack.rs

reifydb_engine/vm/
stack.rs
